Simple Calculator-00

It looks simple. Minimal functions. Apology to users of function capability.

Scientific calculator already released has become popular item. However we have so far received very few requests or feedback about the function capability from users. Some of them gave negative feedback, saying this feature sometimes gets in the way. So we have just removed it.  Don't worry about it. It can still work for quick and accurate calculation as we have left the feature of popular computational engine, the layout and the function of history.

We continue to do our best in making it much easier to use. We very much welcome your feedback!